Winding device



Feb. s, 1962 N. SCHIP-F 3,019,999

WINDING DEVICE Filed Sept. l, 1960 3 Sheets-Sheet 1 @wbr-208g? ATTO R NEY N. SCHIF F WINDING DEVICE Feb. 6, 1962 3 sheets-.sheet 2 Filed sept.y21, 1960 INVENTOR J @W ATTORNEY y BY Feb. 6, 1962 N. scHlFF 3,019,999

WINDING DEVICE Filed Sept. 21, 1960 3 Sheets-Sheet 3 f J9 a 2 L a if;

@AC/yq@ United States Patent 3,019,999 Patented Feb. 6, 1962 ice3,019,999 WENDING DEVICE Norman Schiff, Franklin Park, NJ., assigner toJohnson da liohuson, a corporation of New Jersey Filed Sept. 21, 1960,Ser. No. 57,451 6 Ciatms. (Cl. 242-7551) This invention relates to amechanism and method for winding a web of sheet material having littlebody and which deforms readily as by wrinkling even under slighttension. Winding is accomplished in a way such that in the finished rollthe material is devoid of Wrinkles and has good edge alignment asbetween its various convolutions.

Wrinkles formed by the application of tension in material of this typewill, if allowed to remain in the web as it is wound up, becomepermanent creases and render y the material unt for its intended use.Furthermore, it such a web is kept under tension at all times during thewinding operation, its extreme lack of rigidity Will render ineffectivethe use of guiding devices which apply pressure to the edge of the webin order to locate it appropriately.

In accordance with the invention web material is wound upon a reelmounted on a spindle, As the spindle rotates to effect the windupoperation it necessarily imparts some tension to the web which formslongitudinal Wrinkles to which reference has just been made. At a givenphase in each revolution of the Windup spindle, the windup torqueexerted thereon is interrupted and the spindle freed. During this periodof interruption, devices associated with the spindle cause it to reverseits rotation for a fraction of a revolution to render the material inthe outer convolution of the Wound up roll loose and devoid of tension.YSince permanent deformation has not taken place, removal of tension hasthe etfect of allowing the loose material in the outer convolution toreturn to its normal unwrinkled state. Whenwindup torque is againapplied, the spindle resumes rotation in a normal direction and theloose material is first wound up under substantially no tension until itlies iiat on the underlying convolution before any substantial tensionis again exerted in the web to pull it along from the source ot'material from which it is obtained.

Obviously too, when a web of such material is longitudinally wrinkledunder tension, its width from edge to edge will have been reduced and,if the wrinkles are wound into the web, registration of the edges of thevarious convolutions one with another will be absent. However, if thewindup reel is equipped with edge guide means they will, when the webassumes its normal width upon release of tension, serve appropriately toposition the edges of the web during the takeup of the loop and prior tothe continued exertion of tension as the windup operation proceeds.

A better understandingof the invention lmay be had by reference to theaccompanying drawings wherein:

FIG. l is a perspective view of a machine equipped with the presentimprovements, parts of the machine being cut away to expose itsoperating parts;

FIG. 2 is a perspective view of part of the machine shown in FIG. l, butat a different phase in its cycle of operation;

FIGS. 3, 4, 5 and 6 illustrate diagrammatically the formation anddissipation of looseness in the web material during different phases ofa windup cycle; and

FIG. 7 is a wiring diagram better to illustrate operation of certain ofthe parts.

A roll of material 19 having a tendency to deform longitudinally intowrinkles upon application of longitudinal tension is supported on aspindle 11 fixed in the near side member'of v'the machine frame and fromwhich the material in the form of a web 12 is unwound as it travelsforward through the machine to and through a mechanism 13 which mayperform any suitable and desired operation on the web (FIG. l). Fromthis mechanism the web 12 advances at constant linear speed through themachine under the inuence of a pair of closely spaced pull rolls 14, 15mounted one above the other on parallel shafts 16, 17 transverse to thewebs travel and which engage the web, one from above andthe other frombelow. The parallel shafts 16, 17 are jour naled for rotation in thenear side frame member of the machine and a chain driven sprocket 13 onthe lower shaft drives both the rolls in opposite directions to advancethe web through the medium of a pair of meshing pinions 19, 2h fixed oneon each of said shafts.

The web 12 passes up and partially around the top pull roll 15 and thenin an S path between it and an overlying idler roll 21 mounted forrotation on a transverse shaft 22 tixed in the machine frame.

From the idler roll 21 the web 12 advances at controlled speed asdetermined by the speed of rotation of the pull rolls 14, 15, to awindup reel 23 lixed on and against relative rotation with respect to atransverse windup shaft 24 journaled at one position along its length inthe near side frame member of the machine. The windup shaft is connectedthrough a magnetic clutch 25 whose casing has a fixed support in themachine frame with another shaft 26 in axial alignment with the windupshaft and which likewise is journaied for rotation in the far side framemember of the machine. A sprocket 27 iixed on this shaft is driven by achain 28 from a sprocket 29 fixed on the same shaft 17 which, it will berecalled, accommodates the top one of the pull rolls which isinstrumental in controlling the speed of travel of the web through themachine. The windup shaft thus has a common drive with the pull rolls.

The ratio of the sprockets 27, 2% is such that the shaft 26, when themagnetic clutch is energized, tends always to drive the windup reel at aspeed in excess of that per- -mitted by the pull roll controls andconsequently at a speed which always exerts tension on the traveling webduring the windup operation. However, since the magnetic clutch 25 is aslip clutch, the slippage which takes place permits the speed of thewindup shaft 24 to accommodate itself to the increasingdiameter of theroll on the real windup. The tension in the web 12 which re'-V sultsfrom the tendency lof the magnetic clutch to over-V variety and, by wayof example, that may be used which is sold under the trademarkMagueclutch by Vickers Electric Division of Vickers Inc. St. Louis,Missouri, and illustrated in Bulletin No. GOGO-A, 11-53, and inSupplement No. l of that bulletin, published by that cornpany. rthemagnetic clutch is energized from a source of D C. current to whichreference is made hereinafter. Switch contacts 30 in the D C. currentcircuit effect a driving connection to the wndup shaft 24 by energizingVthe magnetic clutch 25 when the switch is closed and disestablishes thedriving connection when the switch is`v open. Opening and closing of theswitch may be under the control of a rotatable edge cam 31 having highand low portions, and driven from a timing motor 32. In the particularembodiment shown, the normal position of the switch, i.e.,` when the camis at rest, is its closed this circuit remains established for so longas the switch arm 33 continues on the high portion of the cam back toits normal position and for so long also as the cam then remains atrest. Normally closed contacts 45 in the relay holding circuit aremomentarily opened near the conclusion of the timing motor cycle. Thisacts to break the relay holding circuit with consequent disengagement ofthe contacts 42 which were established upon operation of the switch 34initially closed by the movement of the crank arm 315, and the parts arethen ready for the next cycle of operation of the machine. As previouslystated, closing of the crank arm operated switch 34 by upward movementof the crank arm immediately after it has dropped back to verticalposition with deenergization of the magnetic clutch, has no eect becauseat that time the holding circuit through the relay 4i) remainsoperative.

A suitable Atiming motor, magnetic controls therefor, and cam controlledswitch operated thereby are available on the market. One such suitabledevice is a Series RC single cycle multi-cam timer described in BulletinNo. ZOO which together with operating instruction sheets for such timersare published by Industrial Timer Corporation of Newark, New Jersey.

The invention has been described in connection with one embodimentthereof only and many modifications are included within its spirit. Theinvention therefore is to be limited only by the scope of the pendingclaims.

What is claimed is:

l. A windup device for a traveling web of sheet material wh-ichcomprises: a source from which the traveling web of sheet material isdelivered at a controlled speed, means including a windup shaft on whichthe traveling web of sheet material is wound, devices for applyingtorque to the windup shaft tending to rotate the shaft in one directionto wind up the material at a speed greater than the controlled speed,and means including devices for periodically interrupting theapplication of said torque and for applying said torque again after acontrolled period of interruption, said last mentioned means includingalso instrumentalities for reversing the rotation of said shaft duringsaid period of interruption.

2. A windup device for traveling web of sheet material which comprises:a source from which the traveling web of Sheet material is delivered atcontrolled speed, meanstincluding `a windup shaft on which the travelingweb of sheet material is wound, devices including a slip clutch adaptedwhen engaged to transmit torque to the windup shaft tending to rotatethe shaft in one direction to wind up the material at a speed greaterthan the controlled speed, yand means including devices for periodicallydisengaging the clutch to 4interrupt transmission of said torque and forre-engaging the clutch again after a controlled period of interruption,said last mentioned means including also instrumentalities for reversingrtation of said shaft during the period when the clutch is disengaged.

3. A windup device for a traveling web of sheet material whichcomprises: a source from which the traveling web of sheet material isdelivered at controlled speed, means including a windup shaft on whichthe traveling web of sheet material is wound in convolutions, devicesincluding a slip clutch adapted when engaged to transmit torque to thewindup shaft tending to Wind up the web of sheet material in onedirection at a speed greater than its controlled speed of delivery, andwhen disengaged to interrupt transmission of torque to the windup shaft,means for disengaging and re-energizing the clutch once during thewinding of each convolution of web material, and instrumentalities forreversing rotation of the shaft during the period when the clutch isdisengaged whereby substantially tension-free material is made availablein the travelling web from which web material is rewound upon the rollupon re-engagement of the clutch.

4. A windup device for a traveling web of sheet material which comprisesa source from which the traveling web of sheet material is delivered atcontrolled speed, means including a windup shaft on which the travelingweb of sheet material is wound, devicesV including a slip clutch adaptedwhen engaged to transmit torque to the windup shaft tending to wind upthe web of sheet material in one direction lat -a speed greater than itscontrolled speed of delivery, and when disengaged to interrupttransmission of torque to the windup shaft, means controlled from the`windup shaft for disengaging and Lre-engaging the clutch once duringthe winding of each convolution of web material, and instrumentalitiesincluding a weighted crank arm for effecting a reverse movement of thewindup shaft through ya portion of a revolution during the period whenthe clutch is disengaged whereby substantially tension-free material ismade available in the traveling web from which web material is rewoundupon the roll upon reengagement of the clutch.

5. A windup device for la traveling web of sheet material whichcomprises a source from which the traveling web of sheet material isdelivered at controlled speed, means including a windup shaft on whichthe traveling web of sheet material is wound, devices including amagnetic clutch adapted when energized Vto transmit torque 1to thewindup shaft tending to wind up the web of sheet material in onedirection at a speed greater than its controlled speed of delivery andwhen de-energized to interrupt transmission of torque to the windupshaft, a circuit containing the magnetic clutch together with a switchoperable to control energization and de-energization of the clutch, atiming device associated with the switch for determining the period theclutch is de-energized and having a cycle of operation inaugurated underthe control of the windupshaft, and means associated with the shaft foreffecting reverse rotation of the shaft during the period the clutch isde-energized whereby substantially tension-free material is madeavailable in the last wound convolution of web material from which theweb material is rewound upon the roll when the magnetic clutch isre-energized.

6. A windup device for a traveling web of sheet material which comprisesa source from which the traveling web of sheet material is delivered atcontrolled speed, means including a windup shaft on which the travelingweb of sheet material is wound, devices including a magnetic clutchadapted when energized to transmit torque to the windup shaft tending towind up the web of sheet material in one direction at a speed greaterthan its controlled speed of delivery land when de-energized tointerrupt transmission of torque to the windup shaft, a circuitcontaining the magnetic clutch together will a switch operable tocontrol energization and de-energization of the clutch, a timing deviceassociated with the switch for determining the period the clutch isde-energized and having -a cycle of operation inaugurated under thecontrol of the windup shaft, means associated with the shaft foreffecting reverse rotation thereof during the period the clutch isde-energized whereby substantially tension-free material is made-available in the last wound convolution of web material from which theweb material is rewound upon the roll when the magnetic v clutch againis `re-energized, and a common drive shaft for the source yfrom whichthe traveling web of sheet material is delivered to the windup deviceIand from which torque for rotating the windup shaft is deliveredthrough the magnetic clutch.

References Cited in the file of this patent UNITED STATES PATENTS1,209,755 Power Dec. 26, 1916 2,946,534 Allendorf July 26, 1960 FOREIGNPATENTS 468,068 Canada Sept. 12, 1950

